A multimeter, sometimes also called polimeter or tester is a measuring instrument that provides the
ability to measure various electrical parameters and magnitudes in the same
apparatus. The most common are those of voltmeter, ammeter and ohmmeter. It is
frequently used by staff across the range of electronics and electricity.
The various common features in current multimeters are:
avoid electrical shock, personal injury or damage to the Meter, disconnect
circuit power and discharge all high-voltage capacitors before testing
resistance, continuity, diodes, or capacitance.
The continuity function works best as a fast, convenient
method to check for open circuit or short sections. In order to obtain maximum
accuracy when measuring resistance, use the resistance (OHMS ) meter.
Measuring AC and DC
With the function selector in the position of VCD or VAC he
makes a measurement of DC or AC voltage based on the input applied between the
V + and COM jacks. This function also sets the input impedance of about 3 ohm
meter to reduce the possibility of false readings due to ghost voltages.
Measuring AC and DC millivolts
With the function switch in
position mV multimeter measures AC or DC millivolts.
Measuring AC and DC
To avoid personal
injury or damage to the meter:
Never try to take a
measurement of current in a circuit when the voltage of open ground circuit is
greater than 600 V.
Before the test, check the
Use the proper terminals,
switch position, and range for measurements.
Never place the probes in
parallel with a circuit or component when the leads are plugged into the
current terminals A (Amps).
Turn off power to the circuit,
open circuit, insert the meter in series with the circuit and reconnect the
Measuring currents greater than 10 Amps
The millivolt and voltage function
of the Meter can be used with an optional current probe output mV / A to
measure currents that exceed the rating of the meter. Make sure the meter has
the correct function, AC or DC, selected for the current probe.
See the catalog of current peaks or
contact to find out what the current clamps are compatible.
Measuring Capacitance (some models)
Download the capacitors before
making the measurement.
Frequency measurement (some models)
The meter measures the frequency of
a signal by counting the number of times it crosses a trigger level each
second. The trigger level is 0 V, 0 A for all ranges. The frequency works only
with the functions of CA.
Detection of AC voltage (some models)
To detect the presence of ac
voltage, place the top of the meter near a conductor. When voltage is detected,
the meter emits an audible and visual signal.